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/* SPDX-License-Identifier: GPL-2.0-only */
/******************************************************************************
* asm-x86/guest/hypervisor.h
*
* Copyright (c) 2019 Microsoft.
*/
#ifndef __X86_HYPERVISOR_H__
#define __X86_HYPERVISOR_H__
#include <xen/cpumask.h>
#include <asm/e820.h>
struct hypervisor_ops {
/* Name of the hypervisor */
const char *name;
/* Main setup routine */
void (*setup)(void);
/* AP setup */
int (*ap_setup)(void);
/* Resume from suspension */
void (*resume)(void);
/* Fix up e820 map */
void (*e820_fixup)(struct e820map *e820);
/* L0 assisted TLB flush */
int (*flush_tlb)(const cpumask_t *mask, const void *va, unsigned int flags);
};
#ifdef CONFIG_GUEST
const char *hypervisor_probe(void);
void hypervisor_setup(void);
int hypervisor_ap_setup(void);
void hypervisor_resume(void);
void hypervisor_e820_fixup(struct e820map *e820);
/*
* L0 assisted TLB flush.
* mask: cpumask of the dirty vCPUs that should be flushed.
* va: linear address to flush, or NULL for entire address space.
* flags: flags for flushing, including the order of va.
*/
int hypervisor_flush_tlb(const cpumask_t *mask, const void *va,
unsigned int flags);
#else
#include <xen/lib.h>
#include <xen/types.h>
static inline const char *hypervisor_probe(void) { return NULL; }
static inline void hypervisor_setup(void) { ASSERT_UNREACHABLE(); }
static inline int hypervisor_ap_setup(void) { return 0; }
static inline void hypervisor_resume(void) { ASSERT_UNREACHABLE(); }
static inline void hypervisor_e820_fixup(struct e820map *e820) {}
static inline int hypervisor_flush_tlb(const cpumask_t *mask, const void *va,
unsigned int flags)
{
return -EOPNOTSUPP;
}
#endif /* CONFIG_GUEST */
#endif /* __X86_HYPERVISOR_H__ */
/*
* Local variables:
* mode: C
* c-file-style: "BSD"
* c-basic-offset: 4
* tab-width: 4
* indent-tabs-mode: nil
* End:
*/
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